We provide music on a royalty-free basis. "Royalty free" means when you purchase a music license for a particular number of projects / size of the audience you don't have to pay any additional royalties to the rights holder every time it is played. If you're buying a royalty free production license for YouTube, simply contact AdRev with details of your license and video afterwards: http://adrev.net/contact-us or ask me to whitelist your channel: contact@worldbeyond.net All copyright notices are cleared within 24 hours.